A Study Was Conducted to Investigate the Effect of an Intervention

question 74

Multiple Choice

A study was conducted to investigate the effect of an intervention protocol on IQ tests.Nine randomly selected students were tested. $$\begin{array} { l c } \text { Before } & \text { After } \\100 & 106 \\111 & 112 \\93 & 95 \\92 & 90 \\99 & 107 \\85 & 100 \\117 & 126 \\110 & 105 \\98 & 110\end{array}$$
Set up the null hypothesis for the claim that the intervention protocol is effective in increasing scores.

• A)H₀: The probability distribution of test scores before and after the intervention protocol is identical.
• B)H₀: The probability distribution of test scores before the protocol is shifted to the left of the probability distribution of the test scores after the protocol.
• C)H₀: The probability distribution of test scores before the protocol is shifted to the right of the probability distribution of the test scores after the protocol.
• D)H₀: The probability distribution of test scores before the protocol is shifted to the left or right of the probability distribution of the test scores after the protocol.

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Definitions:

Financial Statement

A formal record of a company's financial activities, including the income statement, balance sheet, and cash flow statement.

Permanent/Temporary

Describing the duration of accounts or conditions; permanent refers to longstanding or indefinite, while temporary implies a limited or specific time frame.

Normal Balance

The side (debit or credit) of an account that is expected to have a higher balance, reflecting its nature in the double-entry accounting system.

Financial Statement

A written record that conveys the business activities and the financial performance of a company.